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Perisai Web Scanner is a free security scanning tool by Peris.ai. ProjectDiscovery Nuclei is a commercial security scanning tool by ProjectDiscovery. Compare features, ratings, integrations, and community reviews side by side to find the best security scanning fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, company size fit, deployment model, here is our conclusion:
Startup development teams shipping fast need Perisai Web Scanner because it catches vulnerable dependencies and misconfigured headers in minutes without requiring infrastructure changes. The free tier covers automated scanning across JavaScript libraries and HTTP security posture, removing the cost barrier that usually delays security scanning adoption. Skip this if you're managing legacy monoliths with hundreds of interconnected services or need continuous runtime monitoring post-deployment; Perisai maps application risk at scan time, not in production.
Security teams running high-velocity vulnerability scanning across applications, cloud, and networks will get the most from ProjectDiscovery Nuclei because the 12,000+ template library eliminates weeks of custom detection work and the AI-powered template creation handles zero-days faster than manual rule writing. The hybrid deployment model and real-time automated scanning workflows mean you can scan internal and external attack surfaces without rebuilding your scanning infrastructure. Skip this if your priority is patch management integration or if you need deep correlations across vulnerability findings; Nuclei is a scanner first, not a risk quantification platform.
Automated web scanner detecting vulnerabilities and HTTP security headers
Vulnerability scanner using templates to scan apps, cloud, and networks
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Common questions about comparing Perisai Web Scanner vs ProjectDiscovery Nuclei for your security scanning needs.
Perisai Web Scanner: Automated web scanner detecting vulnerabilities and HTTP security headers. built by Peris.ai. headquartered in Singapore. Core capabilities include Automated vulnerability scanning for web applications, Detection of vulnerable JavaScript library versions, HTTP security header analysis and recommendations..
ProjectDiscovery Nuclei: Vulnerability scanner using templates to scan apps, cloud, and networks. built by ProjectDiscovery. headquartered in United States. Core capabilities include Template-based vulnerability scanning with 12,000+ templates, Scanning for applications, cloud infrastructure, and networks, Internal and external network scanning capabilities..
Both serve the Security Scanning market but differ in approach, feature depth, and target audience.
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